No, you're not imagining it.
Thanks, but what I refer to is something different than a prediction of the towers being hit from the sky. This was a detailed explanation of the plan from someone who claimed to have inside information. It was reported in advance that there were plans to hijack multiple airliners and fly them into the towers, the Pentagon, the White House and Camp David. It was also reported that engineering calculations indicated that a freshly fueled airliner would create enough heat to cause a tower to collapse. All these plans were said to have been developed by and for Osama Bin Laden who was said to be the force behind the plan. I don't remember a specific date being laid out but I think there was a general time frame mentioned.